Grey Water treatment plant

1. Water is a precious commodity. At WES,
we’re committed to preserving it. Our cutting
edge water recycling systems are the
sustainable, cost-effective way to reduce
water consumption. This gives commercial
developers modular solutions to on-site
greywater recycling.
Understanding greywater
Greywater makes up around 30–50% of
wastewater discharged into our sewers.
Therefore, greywater recycling offers
facilities the chance to cut their water use by
up to half.Generally defined as wastewater
from bathrooms and laundries, greywater
can come from our showers, baths, basins
and washing machines. It may be
contaminated with a range of soluble and
insoluble (particulate) substances, from
soaps and detergents, to skin and saliva, to
dirt and lint. Each type of contaminant,
whether it is detergent/surfactant, organic,
microbial or particulate, must be treated
appropriately. Designed with a multi-barrier
approach, it combines a range of purifying
processes to remove the various
contaminants.
Complete confidence and support
Built-in control logic and instrumentation
continuously react to the ever-changing
quality of effluent without the need for an on-
site operator. Expertly trained engineers
remotely monitor all systems via the Internet,
twenty-four hours a day, seven days a week.
Regulatory compliance
Data acquisition and compliance reporting are
built into the WES system from the ground upAll
our systems are backed by expert knowledge,
service and maintenance support. This is our
ongoing guarantee to ensure your peace of
mind.
Commercial buildings and multiple dwellings
– one recycling solution.
Why lose it when you can re-use it?
GREY WATER
SUSTAINABLE WATER SOLUTIONS

2. The System
The technology is utilized in this system
features a controlled, robust and
comprehensive treatment process that
combines physical, microbiological and
oxidative treatments into the one
package:
Collection point – Water flows from the
property to a collection point, whereby it
is pumped into the Aquacell to begin the
treatment process.
Aerobic screening – The first step is a
unique odor free process that efficiently
reduces insoluble material to a negligible
residue.
This residue is usually discharged to sewer
and the remaining greywater flows into the
second module.
Biological Treatment – Air is diffused into
the water to create optimum conditions for
bacteria to consume impurities. A sustainable
biomass concentration is maintained, which
metabolizes all incoming waste – resulting in
negligible sludge. Of the incoming water,
99.9%
is reused.
Ultrafiltration – Ultrafiltration occurs through
a special membrane of microscopic pores
that prevents particles, bacteria and viruses
from passing through. The membranes are
cleaned by air scouring, ensuring no
wastewater
is produced.
Ultraviolet disinfection – As a precaution,
Ultraviolet lamps are provided. These act asa
further barrier, providing additional protection
against pathogens.
Chlorination – Finally, a chlorine residual is
added to protect the water while in storage
and the reticulation system – the only time
any chemicals are used throughout the
treatment process.
Treated water storage – The result is safe
water, kept in storage for future use in a
variety of applications, including surface
irrigation, toilet flushing and washing
machines.
Typical Greywater performance
Parameter Influent water quality Treated water quality
Biochemical Oxygen Demand (BOD), mg/L 80–200 <5
Suspended solids, mg/L 50–200 <1
Total Nitrogen, mg/L 30–50 <15*
Total Phosphorous, mg/L 20 <10
Faecal coliforms, cfu/100ml 106–108 <1
E Coli., organisms/100ml 106–108 <1
Turbidity, NTU <2
Viruses 99.999%
Power consumption Less than 2kWh per 275 gal. produced
* Levels <10 can be achieved if required.
An ISO 9001: 2008 CompanySUSTAINABLE WATER SOLUTIONS